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公开(公告)号：CA2499828A1
公开(公告)日：2004-04-15
申请号：CA2499828
申请日：2003-09-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , INOUE MIKIO , OKADA KENYA , ISOI SHINYA
Abstract: A nonwoven fabric comprising a flame-retardant acrylic fiber, characterized in that it has a weight per square-meter of 70 to 190 g/m2, a thickness of 0.1 to 0.3 mm, a density of 0.35 to 0.8 g/cm3; and a nonwoven fabric comprising a carbon fiber, characterized in that it has a weight per square-meter of 50 t o 150 g/m2, a thickness of 0.1 to 0.25 mm, a density of 0.3 to 0.7 g/m3, a surface roughness Ra of 30 .mu.m or less, a tensile strength of 0.2 kgf/cm o r more, and a maximum fracture radius being defined in the specification of 20 mm or less. Said carbon fiber nonwoven fabric is produced by subjecting the above flame-retardant acrylic fiber to a carbonization treatment and can be suitably used as a material for forming an electrode of a fuel cell.
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公开(公告)号：CA2463777A1
公开(公告)日：2003-04-24
申请号：CA2463777
申请日：2002-10-11
Applicant: TORAY INDUSTRIES
Inventor： INOUE MIKIO , IGAKURA SHUICHI , CHIDA TAKASHI
Abstract: A fuel cell-use carbon fiber woven fabric, especially a carbon fiber woven fabric preferably used for the electrode diffusion layer of an electrode element in a fuel cell. The electrode diffusion layer of an electrode elemen t in a fuel cell, requiring conductivity, gas diffusing/permeating features, a nd strength that withstands handling, is formed from carbon fiber woven fabrics as is widely known. The conventional carbon fiber woven fabric poses such problems that deformation by compression is large, the dimension of a fuel cell is significantly changed by pressurizing, irregularities by weave textu re are large, and contact resistance is large. A carbon fiber woven fabric used for a fuel cell-use carbon fiber woven fabric has an average size of warps a nd wefts constituting the woven fabric of 0.005-0.028 g/m, and a woven density of the warps and/or wefts of 20 pieces/cm.
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公开(公告)号：CA2351379A1
公开(公告)日：2001-03-29
申请号：CA2351379
申请日：2000-09-19
Applicant: TORAY INDUSTRIES
Inventor： NAKAE TAKEJI , INOUE MIKIO
Abstract: A porous, electrically conductive sheet, which (a) comprises a sheet formed with a number of carbon fibers having an organic substance adhered thereto, (b) has an electrical resistance in the direction of thickness of 50 m .OMEG A. cm2 or less, (c) has a maximum diameter for causing fracture of 25 mm or les s, and (d) has a compression ratio (the ratio of a thickness of a compressed sheet to that of an original sheet) of 40 % or less. The porous, electricall y conductive sheet can be produced by a method comprising (a) a sheet-forming step of scooping a number of carbon fibers being dispersed in a liquid up on to a net to thereby form a carbon fiber sheet, (b) an organic substance adhesio n step of rendering an organic substance to adhere to the formed carbon fiber sheet as a binder for carbon fibers, (c) a drying step of drying the sheet having the organic substance adhered thereto, and (d) a pressing step of pressing the dried sheet with a face pressure of 0.49 to 9.8 Mpa and/or of subjecting the sheet to a roll pressing with a clearance of 300 .mu. m or le ss.
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公开(公告)号：CA2977344A1
公开(公告)日：2016-09-29
申请号：CA2977344
申请日：2016-03-22
Applicant: TORAY INDUSTRIES
Inventor： INOUE MIKIO , ODA TAKAYUKI , SUZUKI TAMOTSU
Abstract: The present invention provides a porous carbon electrode base material in which short circuits are unlikely to occur when the porous carbon electrode material is used in a fuel cell, and in which adequate removal is achieved for carbon fibers projected from the base material surface, carbon fibers that project from the base material surface under pressure applied in the direction that is normal to the surface, and short carbon fibers with insufficient bonding on the surface. The present invention is a porous carbon electrode base material in which short carbon fibers are bonded with a resin carbide, the porous carbon electrode base material characterized in that the average value of the short-circuit current measured from one surface (referred to as "surface A") is 10 mA or less.
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公开(公告)号：CA2350925A1
公开(公告)日：2000-05-25
申请号：CA2350925
申请日：1999-06-04
Applicant: TORAY INDUSTRIES
Inventor： INOUE MIKIO , NAKAE TAKEJI
Abstract: A porous conductive sheet containing at least inorganic conductive fibers an d soft inorganic conductive particles which are made of expanded graphite in o ne aspect of the invention. Unlike conventional porous conductive sheets, the member constituting the porous conductive sheet of the invention is immune from breakage even in the steps of forming the sheet and incorporating the sheet in a cell and from coming off, thereby lowering the production cost.
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Patent Agency Ranking
公开(公告)号：CA2294803A1
公开(公告)日：1999-12-02
申请号：CA2294803
申请日：1998-05-27
Applicant: TORAY INDUSTRIES
Inventor： INOUE MIKIO
Abstract: A carbon fiber paper usable as a current collector for solid polymer fuel cells, which is out of danger of short-circuiting with a counter electrode, is not destroyed even by pressurizing, exhibits a relatively low resistance, and is inexpensive. Specifically, a carbon fiber paper for solid polymer fuel cells which is used in the cell in a state wherein the short carbon fibers of the paper are bound with a polymeric substance and which is characterized in that at least 95 % of the short carbon fibers excepting those having lengths of (Y + 0.1) mm or below satisfy the relationship: W5X, wherein X is the thickness (mm) of the paper, Y is the thickness (mm) thereof under pressurizing at 2.9 MPa, and W is the length (mm) of each short carbon fiber. It is preferable that the short carbon fibers satisfy also the relationship: Z5X, wherein Z is the average length (mm) of the short fibers. The carbon fiber paper exhibits a weight loss of 3 % or below as determined by applying a uniform surface pressure of 2.9 MPa in the thicknesswise direction for 2 minutes and releasing the surface pressure, and the short carbon fibers contained in the carbon fiber paper satisfy the following relationship: .sigma./(ED) 0.5 10-3, wherein D is the diameter (.mu.m) of the short carbon fibers, .sigma. is the tensile strength (MPa) thereof, and E is the tensile modulus (MPa) thereof.
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公开(公告)号：CA2623129C
公开(公告)日：2013-07-02
申请号：CA2623129
申请日：2006-08-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , INOUE MIKIO , OKADA KENYA
Abstract: A porous carbon sheet obtained by binding separate carbon short fibers with a carbonization product of a resin, wherein the pore mode diameter of the sheet is 45 to 90 µm and the mean fiber diameter of the carbon short fibers is 5 to 20 µm. The sheet can be produced by thermoforming a precursor fiber sheet comprising carbon short fibers of 15 to 30 g/m2 in basis weight and a thermosetting resin of 30 to 80 g/m2 in basis weight by hot plates having a certain clearance and carbonizing the thermosetting resin contained in thermoformed precursor fiber sheet.
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公开(公告)号：CA2520025C
公开(公告)日：2012-01-03
申请号：CA2520025
申请日：2004-03-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , OKADA KENYA , INOUE MIKIO , ISOI SHINYA
IPC: D06C9/04 , C04B35/83 , C04B38/00 , D01F9/22 , D04H1/64 , D06C15/02 , D06M11/74 , H01M4/86 , H01M4/88 , H01M4/92 , H01M4/96 , H01M8/10
Abstract: A porous carbon base material, which comprises a sheet containing carbon short fibers dispersed randomly and a carbonized resin, wherein the carbon short fibers are bound by the carbonized resin and the volume of pores having a pore diameter of 10 µm or less is 0.05 to 0.16 cc/g; and a method for producing the porous carbon base material, which comprises transporting a precursor fiber sheet comprising carbon short fibers dispersed randomly and a resin intermittently to a space between heated plates, subjecting the precursor to a heating and pressuring treatment by the heated plates while the transformation stops, carrying out the transportation of the sheet after the treatment, and then carrying out a heat treatment, to thereby carbonize the resin in the sheet.
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公开(公告)号：CA2623129A1
公开(公告)日：2007-04-05
申请号：CA2623129
申请日：2006-08-25
Applicant: TORAY INDUSTRIES
Inventor： CHIDA TAKASHI , OKADA KENYA , INOUE MIKIO
Abstract: A porous carbon sheet obtained by binding separate carbon short fibers with a carbonization product of a resin, wherein the pore mode diameter of the sheet is 45 to 90 µm and the mean fiber diameter of the carbon short fibers is 5 to 20 µm. The sheet can be produced by thermoforming a precursor fiber sheet comprising carbon short fibers of 15 to 30 g/m 2 in basis weight and a thermosetting resin of 30 to 80 g/m 2 in basis weight by hot plates having a certain clearance and carbonizing the thermosetting resin contained in thermoformed precursor fiber sheet.
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公开(公告)号：CA2520025A1
公开(公告)日：2004-10-07
申请号：CA2520025
申请日：2004-03-25
Applicant: TORAY INDUSTRIES
Inventor： INOUE MIKIO , OKADA KENYA , CHIDA TAKASHI , ISOI SHINYA
IPC: D06C9/04 , C04B35/83 , C04B38/00 , D01F9/22 , D04H1/64 , D06C15/02 , D06M11/74 , H01M4/86 , H01M4/88 , H01M4/92 , H01M4/96 , H01M8/10 , D04H1/42
Abstract: A porous carbon base material, which comprises a sheet containing carbon sho rt fibers dispersed randomly and a carbonized resin, wherein the carbon short fibers are bound by the carbonized resin and the volume of pores having a po re diameter of 10 .mu.m or less is 0.05 to 0.16 cc/g; and a method for producin g the porous carbon base material, which comprises transporting a precursor fiber sheet comprising carbon short fibers dispersed randomly and a resin intermittently to a space between heated plates, subjecting the precursor to a heating and pressuring treatment by the heated plates while the transformati on stops, carrying out the transportation of the sheet after the treatment, and then carrying out a heat treatment, to thereby carbonize the resin in the sheet.
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